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Computing > Digital Data > Flashcards

Digital Data Flashcards

1
Q

What is Data?

A

Raw facts and figures

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2
Q

What is information?

A

processed Data

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3
Q

In What format does the computer store data?

A

Binary Format

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4
Q

1 nibble = ?

A

4 bits

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5
Q

1 byte = ?

A

8 bits

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6
Q

1 kilobyte= ?

A

1024 bytes

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7
Q

1 megabyte= ?

A

1024 kilobytes

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8
Q

1024 megabytes=?

A

1 Gigabyte

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9
Q

1024 Gigabytes=?

A

1 Terabyte

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10
Q

Explain Datatype numeric

A

No decimal

+/-

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11
Q

What is a pixel?

A

A smallest unit of a digital image that can be displayed

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12
Q

What is Image resolution

A

Represents the quality of an image
More pixels = higher quality

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13
Q

What is a Bitmap Image?

A

Made up of Pixels

Stores details about every pixel on the image

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14
Q

Advantage of Bitmap

A

Can be compressed which reduces file size

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15
Q

Disadvantage of Bitmap

A

Storing every pixel means that file size is large

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16
Q

What is a vector image?

A

stores information about the components that make up a image

17
Q

What is Streaming?

A

Streaming allows a video to be viewed on a website without needed to download it

18
Q

What is Buffer?

A

When the user if watching a part of a video, a buffer is used to download the next part of the video

19
Q

What is sample rate?

A

Number of audio sample captured per second to represent the sounds digitally

20
Q

What is Bit depth?

A

The number of bits used for each sound sample

21
Q

Explain Analogue to Digital Conversion

A

An analogue signal represents a physical quantity
An analogue to digital converter will sample a signal at regular time intervals

22
Q

What is Data Portability

A

The ability to transfer data from one computer to another

23
Q

Expand JPEG

A

Joint Photographic Expert Group

24
Q

Expand TIFF

A

Tagged Image File Format

25
Q

Expand PNG

A

Portable Network Graphics

26
Q

Expand GIF

A

Graphic Interchange Format

27
Q

Expand CSV

A

Comma -separated-value

28
Q

Expand RTF

A

Rich Text Format

29
Q

Expand MIDI

A

Musical Instrument Digital Interface

30
Q

Expand MPEG

A

Moving Picture Experts Group

31
Q

Expand AVI

A

Audio Video Intervealed

32
Q

Expand PDF

A

Portable Document Format

33
Q

Expand WAV

skibidi

A

Waveform Audio File

34
Q

Expand WMA

A

Windows Media Audio

35
Q

Explain Data Compression

A

is used to reduce file size making it easier to store

36
Q

Explain Lossy Compression

A

Reduces file size by removing some data and therefore decreasing the resolution

37
Q

Explain Lossless Compression

A

reduces file size while mantaining quality of data

Computing (11 decks)

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